gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms.

HashSum is a .NET port from GNU's md5sum and sha1sum. It supports: hash algorithm selection between MD5 and SHA1 (more could be added later) and compatibility between HashSum and GNU's checksum file format

NMetabase provides a declarative approach to mapping an object to an ADO.NET command set. It allows the user to provider their own SQL implementation (stored procedures or sql text) to persist or retrieve information from multiple databases.